CVE-2014-4994: Gyazo Gyazo Allows Local Users To Vulnerability

MODERATE
Advisory Identifier: GHSA-6x45-86q6-rcmr
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CVSS 5.5
CWE-20
Published
Advisory Summary

CVE-2014-4994 is a MODERATE (CVSS 5.5) gyazo allows local users to vulnerability (CWE-20: Improper Input Validation) affecting Gyazo libraries in the RubyGems ecosystem. The issue involves gyazo allows local users to write arbitrary files. Remediation is available by upgrading affected packages to version 2.0.0.

CVE-2014-4994 at a Glance

CVE Identifier CVE-2014-4994
GHSA Identifier GHSA-6x45-86q6-rcmr
Severity MODERATE
CVSS v3.1 Base Score 5.5
CWE Classification CWE-20: Improper Input Validation
Affected Product Gyazo
Package Ecosystem RubyGems
Published Date
Last Updated

Security Impact

CVSS: 5.5

The security impact metrics below are parsed directly from the CVSS v3.1 vector string (CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:N).

Attack Vector Local (AV:L)
Attack Complexity Low (AC:L)
Privileges Required Low (PR:L)
User Interaction None (UI:N)
Scope Unchanged (S:U)
Confidentiality None (C:N)
Integrity High (I:H)
Availability None (A:N)

How to Fix CVE-2014-4994

To remediate this vulnerability, upgrade all affected Gyazo dependencies to a patched release. Both direct and transitive dependencies should be checked, as frameworks or security libraries may pull in vulnerable versions transitively.

gyazo fixed: 2.0.0 
Upgrade gyazo to 2.0.0
Verify Direct and Transitive Dependencies

Run the following command in your project directory to verify that all resolved dependencies use the patched release: 

inspect dependencies for gyazo

How to Check if You Are Affected

To determine whether your application is affected by CVE-2014-4994, inspect your project dependencies for Gyazo:

inspect dependencies for gyazo

Analyze the terminal output to locate any version of Gyazo in your dependency tree. If any resolved version matches the vulnerable ranges listed in the table below (for example, versions earlier than 2.0.0), your application is affected.

Note: Verify declared build manifests and deployed runtime container environments.

Technical Details

Vulnerability Mechanism & Technical Analysis

This vulnerability is classified under CWE-20: Improper Input Validation, where the product receives input or data, but it does not validate or incorrectly validates that the input has the properties that are required to process the data safely and correctly. In Gyazo, software state validation or input boundaries are circumvented during processing. Review the official source advisory statement below for specific affected components, classes, and reproduction details.

Source Advisory Statement

`lib/gyazo/client.rb` in the gyazo gem 1.0.0 for Ruby allows local users to write to arbitrary files via a symlink attack on a temporary file, related to time-based filenames.

CVE-2014-4994 Affected Gyazo Versions

1 component(s)
Fixed Versions:
2.0.0
Product / Package Ecosystem Affected Versions Fixed Version
gyazo
gem/gyazo
RubyGems
≥ 1.0.0
< 2.0.0
All 1 versions
1.0.0
2.0.0

References

NVD — CVE-2014-4994 NVD
https://nvd.nist.gov/vuln/detail/CVE-2014-4994
Gyazo Source Repository REPOSITORY
https://github.com/gyazo/gyazo-ruby
Gyazo Source Repository REPOSITORY
https://github.com/rubysec/ruby-advisory-db/blob/master/gems/gyazo/CVE-2014-4994.yml
web.archive.org/web/20200229061943/... WEB
https://web.archive.org/web/20200229061943/http://www.vapid.dhs.org/advisories/gyazo-1.0.0.html
Gyazo Security Information SECURITY
http://www.openwall.com/lists/oss-security/2014/07/07/13
Gyazo Security Information SECURITY
http://www.openwall.com/lists/oss-security/2014/07/17/5

Frequently Asked Questions

What is CVE-2014-4994?
CVE-2014-4994 is a security vulnerability in Gyazo involving Gyazo allows local users to write arbitrary files under CWE-20: Improper Input Validation.
Which Gyazo versions are affected?
Affected versions include releases prior to 2.0.0 across affected packages: gyazo.
What version fixes CVE-2014-4994?
Upgrading to 2.0.0 (or the latest patched release for your respective branch) resolves the vulnerability.
Is gyazo affected?
Yes, gyazo is affected in releases prior to 2.0.0. Upgrade your dependency to 2.0.0 or later.
What is the CVSS score of CVE-2014-4994?
CVE-2014-4994 has a CVSS v3.1 base score of 5.5 (MODERATE) with vector string CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:N.
What CWE is associated with CVE-2014-4994?
CVE-2014-4994 is classified under CWE-20: Improper Input Validation (The product receives input or data, but it does not validate or incorrectly validates that the input has the properties that are required to process the data safely and correctly.).
How can I check RubyGems dependencies for CVE-2014-4994?
Run the dependency tree command: 'inspect dependencies for gyazo'. This command lists direct and transitive dependencies in your build configuration so you can verify if a vulnerable version is resolved.
Machine-readable OSV JSON OSV v1.5 Schema
Normalized schema output
View Raw JSON 
{
  "schema_version" : "1.4.0",
  "id" : "GHSA-6x45-86q6-rcmr",
  "modified" : "2023-07-31T20:50:46Z",
  "published" : "2018-01-22T23:17:39Z",
  "aliases" : [ "CVE-2014-4994" ],
  "summary" : "Gyazo allows local users to write arbitrary files",
  "details" : "`lib/gyazo/client.rb` in the gyazo gem 1.0.0 for Ruby allows local users to write to arbitrary files via a symlink attack on a temporary file, related to time-based filenames.",
  "severity" : [ {
    "type" : "CVSS_V3",
    "score" : "CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:N"
  } ],
  "affected" : [ {
    "package" : {
      "ecosystem" : "RubyGems",
      "name" : "gyazo"
    },
    "ranges" : [ {
      "type" : "ECOSYSTEM",
      "events" : [ {
        "introduced" : "1.0.0"
      }, {
        "fixed" : "2.0.0"
      } ]
    } ],
    "versions" : [ "1.0.0" ]
  } ],
  "references" : [ {
    "type" : "ADVISORY",
    "url" : "https://nvd.nist.gov/vuln/detail/CVE-2014-4994"
  }, {
    "type" : "PACKAGE",
    "url" : "https://github.com/gyazo/gyazo-ruby"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/rubysec/ruby-advisory-db/blob/master/gems/gyazo/CVE-2014-4994.yml"
  }, {
    "type" : "WEB",
    "url" : "https://web.archive.org/web/20200229061943/http://www.vapid.dhs.org/advisories/gyazo-1.0.0.html"
  }, {
    "type" : "WEB",
    "url" : "http://www.openwall.com/lists/oss-security/2014/07/07/13"
  }, {
    "type" : "WEB",
    "url" : "http://www.openwall.com/lists/oss-security/2014/07/17/5"
  } ],
  "database_specific" : {
    "cwe_ids" : [ "CWE-20" ],
    "severity" : "MODERATE",
    "github_reviewed" : true,
    "github_reviewed_at" : "2020-06-16T21:20:27Z",
    "nvd_published_at" : "2018-01-10T18:29:00Z"
  }
}